Detachable coffee machine milk foaming device and foaming mechanism thereof

Abstract

The utility model relates to a detachable coffee machine milk frothing device and a frothing mechanism thereof, and aims to solve the technical problems that the conventional like products are inconvenient to disassemble, assemble and clean and poor in milk frothing effect, and particularly, a bubbler component is hardly disassembled from a knob in the middle of the bottom of a lower cover of a milk box. The milk frothing device is characterized in that a knob is arranged in the middle of a milk box lower cover in a milk box of the milk frothing device of the coffee machine, raised inverted buckles are arranged at the bottom of the knob at equal intervals in pairs and respectively extend out of L-shaped holes of the milk box lower cover, and meanwhile, the inverted buckles are buckled with buckling ribs on the inner wall of an inner sleeve raised in the center in a milk box upper cover through rotation; limiting openings for installing and fixing the bubbler assembly are formed in the two sides of the inner sleeve in the milk box upper cover respectively. A bubbler inner plug is arranged in a bubbler main pipe at one end of the connection part of the bubbler main pipe of the bubbler assembly and a bubbler main body, a bubbler inner plug is fixedly arranged in an orifice at a bulge at the end part of the bubbler main body, and a positioning column of the bubbler main body is screwed into an L-shaped groove at a plug opening of the bubbler inner plug.

Description

Technical Field

[0001] The utility model relates to a milk frothing device for a coffee machine, in particular to a detachable milk frothing device for a coffee machine and a frothing mechanism thereof. Background Art

[0002] A coffee machine is an electrical device used for making coffee, generally divided into semi-automatic and fully automatic types. A semi-automatic coffee machine is a traditional Italian coffee machine that relies on manual operations for grinding, pressing, filling, brewing, and manually removing residue. Some coffee machines require a milk frothing device to enhance the taste of the beverage. Existing coffee machines generally have three ways to achieve milk frothing: a steam wand, a straw, and a milk box. The principles of these three methods are basically the same, all based on the Venturi effect, which uses high-speed steam to draw in air or milk to form milk froth. In existing coffee machines, some devices with milk frothing functions are usually integrated with the main body of the coffee machine, which causes some inconveniences during use and cleaning. On the one hand, the integrated design makes the milk frothing device complex, and the components are fixed with screws, which affects production efficiency. Consumers cannot disassemble the components, making it difficult to perform thorough cleaning. On the other hand, it is easy for bacteria to breed, affecting the hygienic quality of coffee drinks. For this reason, for example, the application number 202410794481.1 disclosed in the Chinese patent literature, the application publication date is 2024.08.16, and the invention name is "A milk frothing device and a coffee machine with the device"; another example is the application number 202310673296.2 disclosed in the Chinese patent literature, the application publication date is 2023.10.03, and the invention name is "Milk frothing device and its milk frothing air intake assembly and button lock assembly"; but the above-mentioned products and similar products mainly remove the box cover by pressing buttons, but after the box cover is removed, the knob in the middle of the bottom of the lower cover of the milk box is rarely used to remove the foamer assembly. At the same time, the internal structure design of the existing foamer assembly is poor, resulting in poor Venturi effect and poor milk frothing effect. The nipple and the milk box occupy a large space, and the layout is not rational. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the present invention aims to provide a fully detachable, detachable coffee machine milk frothing device and its frothing mechanism, free of screw-fastened parts, in the art. This solves the technical problems of existing similar products, which rarely utilize a knob at the bottom center of the milk box lower cover after removing the box cover. Furthermore, existing frothing assemblies suffer from poor internal structural design, resulting in a poor Venturi effect and milk frothing quality, a large space occupied by the nipple and milk box, and a lack of rationality in layout. This objective is achieved through the following technical solution.

[0004] A detachable milk frothing device for a coffee machine comprises a milk box, a milk box lower cover, a milk box upper cover and a foamer assembly, wherein the foamer assembly comprises an air inlet assembly, a steam inlet assembly, a nipple assembly and a straw assembly; the foamer assembly is fixedly arranged in a groove at the top of the milk box lower cover and between the milk box lower cover and the milk box upper cover in the milk box upper cover, the outer diameter of the top notch of the milk box lower cover and the inner diameter of the bottom cover opening of the milk box upper cover are buckled and connected as one, and the foamer assembly is buckled and fixed to the box opening at the top of the milk box by a lock assembly arranged on the milk box lower cover or the milk box upper cover, the steam inlet at the steam inlet assembly of the foamer assembly and the milk outlet at the nipple assembly respectively extend out of the milk box upper cover, and the straw body at the straw assembly of the foamer assembly respectively extends into the milk box through the milk box lower cover. The key structural design features a knob in the middle of the lower cover of the milk box. Two equally spaced, raised undercuts extend from the L-shaped holes in the lower cover. These undercuts rotate to engage with ribs on the inner wall of a raised inner sleeve in the center of the upper cover. The inner sleeve in the upper cover is provided with retaining notches on both sides for mounting and securing the bubbler assembly. Thus, after the lid, consisting of the lower cover, upper cover, and bubbler assembly, is disassembled using the locking assembly, the bubbler assembly can be removed from the knob in the middle of the lower cover for cleaning or component replacement.

[0005] The circular surface of the knob in the milk box is embedded in the lower cover of the milk box and is flush with the plane of the lower cover of the milk box. A raised rotating rib is provided in the middle of the semicircular groove of the knob in the milk box. A knob groove is provided corresponding to the bottom of the knob at the bottom of the rotating rib. The inverted buckles are equidistantly arranged on the raised arc surfaces on both sides of the knob groove at the bottom of the knob, and a through hole is provided on the plane of the lower cover of the milk box outside the knob.

[0006] The lock assembly is symmetrically arranged on both sides of the milk box upper cover, and the lock body of the lock assembly is arranged in the lock groove at the outer diameter of the inner sleeve raised in the center of the milk box upper cover, and the raised rotating shafts on both sides of the lock body are respectively snap-fitted and fixed in the snap-fit ​​grooves in the lock grooves, and the pressing parts on the outside of the lock body respectively leak out of the lock holes on both sides of the milk box upper cover, and the hook parts of the lock body respectively extend out of the bottom cover opening of the milk box upper cover and the side grooves on both sides of the milk box lower cover, and are simultaneously snapped and fixed to the hook grooves on both sides of the top box opening of the milk box, and lock springs are respectively provided between the lock body and the inner wall of the milk box upper cover.

[0007] The milk box is connected to the milk box cover to form a rectangular parallelepiped. The outer diameter of one side of the nipple assembly of the milk box is set from the top to the bottom and an inward transition slope. The nipple assembly corresponding to the outer side of the transition slope is obliquely set on the outer diameter of the milk box.

[0008] A lower rib groove is provided on one side of the top box opening of the milk box, a positioning rib is provided on the side of the lower cover of the milk box corresponding to the lower rib groove, an upper rib groove is provided on the side of the upper cover of the milk box corresponding to the positioning rib, and the positioning rib of the lower cover of the milk box corresponds to the upper rib groove of the upper cover of the milk box and the lower rib groove of the milk box for guiding installation.

[0009] The main body of the frothing mechanism of the milk frothing device of the coffee machine is a frothing device. A frothing tube inner plug is provided in the frothing tube at one end of the connection between the frothing tube of the frothing tube assembly and the frothing body of the steam inlet assembly. The outer diameter of the frothing tube inner plug in the frothing tube is provided with a two-level step circumference, and the outer diameter of the frothing body in the frothing tube is provided with a three-level step circumference. The pipe opening on this side of the frothing tube is provided with a frothing tube cover, another level step circumference of the outer diameter of the frothing body, and one end cover opening of the frothing tube cover are limited to the pipe opening of the frothing tube. At the same time, the positioning block raised on the outer diameter of the frothing body interferes with the other end cover opening of the frothing tube cover and is screwed into the spiral hole on one side of the frothing tube cover to the locking position. A bubbler plug is fixedly mounted within the orifice at the end projection. Positioning posts are symmetrically positioned along the outer diameter of the orifice at the end projection, and screw into an L-shaped slot at the opening of the bubbler plug within the bubbler main pipe. Symmetrical bubble grooves and holes are provided on either side of the outer diameter between the three-stepped circumference of the bubbler body and the orifice at the end projection. The bubbler main pipe is a Venturi tube with tapered diameters increasing sequentially between the bubbler plug at one end of the steam inlet assembly and the three-stepped circumference of the bubbler body. A mounting hole for the air inlet assembly and a connecting hole for the straw assembly are provided on one side of the bubbler body where the bubbler body and the bubbler plug meet. A nipple assembly is provided on the bubbler main pipe at the other end of the steam inlet assembly. Steam entering the steam inlet assembly, milk entering the straw assembly, and air entering the air inlet assembly are mixed and foamed within the bubbler main pipe, the bubbler plug at the steam inlet assembly, and the bubbler body, and finally ejected from the nipple assembly.

[0010] The nipple body of the nipple assembly is inclined " L " shape, one end of the nipple body is installed into the notch of the inner diameter of the hole on the milk box cover through the limiting rib with the raised outer diameter of the port, connected to the bubbler main pipe, and then rotated and fixed, and the limiting ring with the raised outer diameter of the nipple body at the limiting rib is pressed against the hole on the milk box cover for limiting position.

[0011] The other end of the nipple body is provided with a telescopic milk tube, and a telescopic milk tube sealing ring is provided at the connection between the telescopic milk tube and the nipple body.

[0012] A milk box joint sealing ring is provided in the orifice at the other end of the bubbler body of the steam inlet assembly and is fastened and fixed in the bubbler body through the bubbler cover. The outer diameter and aperture of the milk box joint sealing ring are larger than the outer diameter and aperture of the bubbler inner plug. A transition cavity is provided in the bubbler body between the bubbler inner plug and the milk box joint sealing ring bracket.

[0013] The straw main body of the straw assembly is connected to the bubbler main pipe through a straw joint, and a straw inner plug is provided in the straw joint at the connection.

[0014] A milk box air intake piece is provided in the air inlet of the air intake main body at one end of the air intake assembly, and an orifice at the other end of the air intake main body is connected to the connecting hole of the straw assembly of the bubbler main body. A duckbill is provided in the connecting hole of the bubbler main body at the connecting point, and the flat opening at one end of the duckbill is inserted into the connecting hole of the bubbler main body, and the circular opening at the other end of the duckbill is limited to the opening of the connecting hole of the bubbler main body. The air intake assembly is arranged in the upper cover of the milk box, and an air intake gap is provided between the air intake assembly and the inner wall of the upper cover of the milk box.

[0015] The utility model has a reasonable structural design, is easy to disassemble and clean as a whole, has a good frothing effect, occupies a small space between the nipple and the milk box, and is particularly convenient for disassembly, cleaning and replacement of the frothing device and its parts in the box cover. The utility model is suitable for use as a detachable milk frothing device and its frothing mechanism for coffee machines, and is a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the explosion structure of the utility model.

[0017] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure after assembly.

[0018] Figure 3 yes Figure 2 Schematic diagram of the bottom structure after the box lid is opened, the milk box is omitted in the figure.

[0019] Figure 4 yes Figure 3 Schematic diagram of the structure of the bubbler assembly inside the box cover.

[0020] Figure 5 yes Figure 4 The internal structure of the bubbler main pipe, the dotted line in the figure is the bubbler main pipe.

[0021] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure after the bubbler tube inner plug, bubbler tube cover and bubbler body are assembled.

[0022] Figure 7 yes Figure 2 Schematic diagram of the cross-sectional structure Figure 1 .

[0023] Figure 8 yes Figure 2 Schematic diagram of the cross-sectional structure Figure 2 .

[0024] Figure 9 yes Figure 2 Schematic diagram of the cross-sectional structure Figure 3 .

[0025] Figure 10 yes Figure 3Schematic diagram of the structure of the milk box bubbler assembly, milk box upper cover, and milk box lower cover in the open state.

[0026] Serial number and name of the attached drawings: 1. Milk box, 101. Hook slot, 102. Lower rib slot, 2. Knob, 201. Inverted buckle, 3. Lower cover of milk box, 301. L-shaped hole, 302. Positioning rib, 4. Air intake assembly, 401. Air intake piece of milk box, 402. Air intake body, 403. Duckbill, 5. Steam inlet assembly, 501. Bubble machine cover, 502. Milk box joint sealing ring, 503. Bubble machine inner plug, 504. Bubble machine body, 5041. Positioning block, 5042. Positioning column, 5043. Bubble machine slot, 5044. Bubble hole, 6. Bubble aerator main pipe, 7. Milk box cover, 701. Inner sleeve, 7011. Buckle rib, 8. Nipple assembly, 801. Nipple body, 8011. Limiting rib, 8012. Limiting ring, 802. Telescopic milk tube sealing ring, 803. Telescopic milk tube, 9. Lock assembly, 901. Lock body, 902. Lock spring, 10. Straw assembly, 1001. Straw body, 1002. Straw joint, 1003. Straw inner plug, 11. Bubble tube inner plug, 1101. L-shaped groove, 12. Bubble tube cover, 1201. Spiral hole. Implementation Method

[0027] Now, in conjunction with the accompanying drawings, the structure and use of the utility model are further described. Figures 1-10 As shown, the milk frothing device of the coffee machine includes a milk box 1, a milk box lower cover 3, a milk box upper cover 7 and a bubbler assembly, the bubbler assembly includes an air inlet assembly 4, a steam inlet assembly 5, a nipple assembly 8 and a straw assembly 10; the bubbler assembly is fixedly arranged in the groove at the top of the milk box lower cover, and between the milk box lower cover and the milk box upper cover in the milk box upper cover, the outer diameter of the top notch of the milk box lower cover and the inner diameter of the bottom cover of the milk box upper cover are buckled and connected as one, and are buckled and fixed to the box opening at the top of the milk box by a lock assembly 9 arranged on the milk box lower cover or the milk box upper cover, the steam inlet at the steam inlet assembly of the bubbler assembly and the milk outlet at the nipple assembly respectively extend out of the milk box upper cover, and the straw body 1001 at the straw assembly of the bubbler assembly respectively extends into the milk box through the milk box lower cover.

[0028] Its specific structure is as follows: A knob 2 is provided in the middle of the lower cover of the milk box inside the milk box. Two equidistantly positioned raised undercuts 201 extend from the L-shaped holes 301 of the lower cover. These undercuts rotate to engage with ribs 7011 on the inner wall of a raised inner sleeve 701 in the center of the upper cover. The inner sleeve in the upper cover is provided on both sides with retaining openings for mounting and securing the frother assembly. The knob's circular surface is embedded in the lower cover and flush with the surface of the lower cover. A raised rotating rib is provided in the middle of the semicircular groove of the knob inside the milk box. A corresponding knob groove is provided at the bottom of the knob at the bottom of the rotating rib. Two undercuts are equidistantly positioned on the raised curved surfaces on both sides of the knob groove. A through hole is provided on the flat surface of the lower cover outside the knob. The aforementioned latch assembly is symmetrically arranged on both sides of the milk box lid. The latch body 901 of the latch assembly is arranged in a latch groove on the outer diameter of the inner sleeve protruding from the center of the milk box lid. The protruding rotating shafts on both sides of the latch body are respectively snap-fastened into the slots within the latch groove. The pressing portions on the outside of the latch body protrude through the latch holes on both sides of the milk box lid. The hook portions of the latch body extend from the bottom cover of the milk box lid and the side grooves on both sides of the milk box lid, and are simultaneously snap-fastened into the hook grooves 101 on both sides of the top opening of the milk box lid. A latch spring 902 is respectively provided between the latch body and the inner wall of the milk box lid. The milk box lid is connected to the milk box lid to form a rectangular parallelepiped. The outer diameter of one side of the milk box nipple assembly is provided with a transition slope from the top to the bottom and inward. The nipple assembly corresponding to the outer side of the transition slope is arranged obliquely to the outer diameter of the milk box. A lower rib groove 102 is provided on one side of the top box opening of the milk box, and a positioning rib 302 is provided on the side of the lower cover of the milk box corresponding to the lower rib groove. An upper rib groove is provided on the side of the upper cover of the milk box corresponding to the positioning rib. The positioning rib of the lower cover of the milk box corresponds to the upper rib groove of the upper cover of the milk box and the lower rib groove of the milk box for guiding the insertion.

[0029] A bubbler pipe inner plug 11 is provided in the bubbler pipe at one end of the connection between the bubbler pipe of the bubbler assembly and the bubbler body 504 of the steam inlet assembly. The outer diameter of the bubbler pipe inner plug in the bubbler pipe is provided with a two-level step circumference, and the outer diameter of the bubbler body in the bubbler pipe is provided with a three-level step circumference. The pipe opening on this side of the bubbler pipe is provided with a bubbler pipe cover 12, another level step circumference of the outer diameter of the bubbler body, and one end cover opening of the bubbler pipe cover are limited to the pipe opening of the bubbler pipe. At the same time, the positioning block 5041 raised on the outer diameter of the bubbler body interferes with the other end cover opening of the bubbler pipe cover and is screwed into the spiral hole 1201 on one side of the bubbler pipe cover to the locking position; a bubbler pipe is fixed in the hole at the end convexity of the bubbler body in the bubbler pipe. The bubbler plug 503 and the outer diameter of the hole at the end protrusion are symmetrically provided with positioning columns 5042, which are screwed into the L-shaped groove 1101 opened at the plug mouth of the bubbler tube plug in the bubbler main pipe. Symmetrical bubble grooves 5043 and bubble holes 5044 are respectively provided on both sides of the outer diameter between the three-step stepped circumference of the bubbler main body and the hole at the end protrusion; the bubbler main pipe is a venturi tube with a conical diameter increasing in sequence, and the bubbler tube inner plug at one end of the steam inlet assembly and the three-step stepped circumference of the bubbler main body are provided. The bubbler main pipe is a venturi tube with a conical diameter increasing in sequence, and the bubbler main body in the bubbler main pipe is connected to the bubbler tube inner plug on one side thereof. The mounting hole of the air inlet assembly and the connecting hole of the straw assembly are respectively provided on one side of the bubbler main body end, and the bubbler main pipe at the other end of the steam inlet assembly is symmetrically provided with a nipple assembly.

[0030] The nipple body 801 of the nipple assembly is obliquely " L ", one end of the nipple body is connected to the bubbler main pipe through the limiting rib 8011 with a raised outer diameter of the port corresponding to the notch of the inner diameter of the hole on the milk box cover, and then rotated and fixed. The limiting ring 8012 with a raised outer diameter of the nipple body at the limiting rib is restrained and limited by the hole on the milk box cover; the other end of the nipple body is provided with a telescopic milk tube 803, and a telescopic milk tube sealing ring 802 is provided at the connection between the telescopic milk tube and the nipple body. A milk box joint sealing ring 502 is provided in the hole at the other end of the bubbler body of the steam inlet assembly and is fastened to the bubbler body through the bubbler cover 501. The outer diameter and aperture of the milk box joint sealing ring are larger than the outer diameter and aperture of the bubbler inner plug 503. A transition cavity is provided between the inner bubbler plug and the milk box joint sealing ring bracket. The straw assembly's straw body 1001 is connected to the bubbler main pipe via a straw joint 1002, with a straw inner plug 1003 located within the pipe joint at the connection point. A milk box air inlet plate 401 is located within the air inlet port at one end of the air inlet body 402 of the air intake assembly. The opening at the other end of the air intake body connects to the connection hole of the bubbler main pipe on the straw assembly. A duckbill 403 is located within the connection hole of the bubbler main pipe at the connection point. The flat end of the duckbill fits into the connection hole of the bubbler main pipe, while the circular opening at the other end of the duckbill is confined to the opening of the connection hole of the bubbler main pipe. The air intake assembly is located within the milk box upper cover, with an air intake gap between it and the inner wall of the milk box upper cover.

[0031] When in use, the coffee machine's milk frothing device is placed on one side of the coffee machine, the steam inlet assembly is connected to the coffee machine's steam port, and the frothing button is pressed to supply steam, causing the frothing assembly to froth the milk. The milk in the milk tank is then frothed and dispensed from the nipple assembly. When the milk frothing device needs to be cleaned or replaced, the user can easily remove it from the main body of the coffee machine for separate cleaning or maintenance.

[0032] At the same time, the fixing method of the above-mentioned nipple assembly rotates the nipple assembly 180° upward, and one end of the nipple body is inserted into the notch of the inner diameter of the hole on the upper cover of the milk box through the limit rib raised on the outer diameter of the port, and then rotated to a certain angle; this structure is easy to disassemble and easy to clean; the telescopic milk tube has a wide range of uses and can be applied to a variety of different cups. The knob fixing method removes the box cover from the milk box through the lock assembly and then turns it upside down. When the button is fixed, the button is placed downward into the lower cover of the milk box and rotated to the right about 22° to the locking mark. The locking assembly fixing method installs the lock assembly in place, puts the box cover into the milk box, and the lock assembly is fastened to the milk box; when the milk box needs to be removed, press the lock assembly on both sides, and the lock assembly and the milk box buckle will be disengaged, and the milk box or the box cover can be easily removed.

[0033] To sum up, the milk frothing device of the coffee machine adopts a matching spring to realize the extension and retraction of the locking assembly, fix and remove the milk box, which is convenient and reliable to operate; at the same time, the upper cover and the lower cover of the milk box adopt a knob buckle structure to achieve disassembly and clean the internal milk-passing parts; and the nipple assembly adopts a retractable milk tube design, which can be suitable for different cup types.

Claims

1. A detachable milk frothing device for a coffee machine, comprising a milk box (1), a milk box lower cover (3), a milk box upper cover (7) and a bubbler assembly, wherein the bubbler assembly comprises an air inlet assembly (4), a steam inlet assembly (5), a nipple assembly (8) and a straw assembly (10); the bubbler assembly is fixedly arranged in a groove at the top of the milk box lower cover and between the milk box lower cover and the milk box upper cover in the milk box upper cover, the outer diameter of the top notch of the milk box lower cover and the inner diameter of the bottom cover of the milk box upper cover are buckled and connected as a whole, and the bubbler assembly is buckled and fixed to the box opening at the top of the milk box by a lock assembly (9) arranged on the milk box lower cover or the milk box upper cover, the steam inlet at the steam inlet assembly of the bubbler assembly and the milk outlet at the nipple assembly respectively extend out of the milk box upper cover, and the straw body (1001) at the straw assembly of the bubbler assembly respectively extends into the milk box through the milk box lower cover; it is characterized in that A knob (2) is provided in the middle of the lower cover (3) of the milk box in the milk box (1), and raised undercuts (201) are arranged equidistantly in pairs at the bottom of the knob and extend out of the L-shaped holes (301) of the lower cover of the milk box. At the same time, the undercuts are engaged with the buckle ribs (7011) on the inner wall of the inner sleeve (701) raised in the center of the upper cover (7) of the milk box by rotation. Limiting openings for installing and fixing the bubbler assembly are provided on both sides of the inner sleeve in the upper cover of the milk box.

2. The detachable coffee machine milk frothing device according to claim 1, characterized in that The circular surface of the knob (2) in the milk box (1) is embedded in the lower cover (3) of the milk box and is flush with the plane of the lower cover of the milk box. A raised rotating rib is provided in the middle of the semicircular groove of the knob in the milk box. A knob groove is provided at the bottom of the knob at the bottom of the rotating rib. The undercuts (201) are equidistantly arranged on the raised arc surfaces on both sides of the knob groove at the bottom of the knob. A through hole is provided on the plane of the lower cover of the milk box outside the knob.

3. The detachable coffee machine milk frothing device according to claim 1, characterized in that The locking assembly (9) is symmetrically arranged on both sides of the milk box upper cover (7), and the locking body (901) of the locking assembly is arranged in a locking groove at the outer diameter of the inner sleeve (701) protruding from the center of the milk box upper cover. The protruding rotating shafts on both sides of the locking body are respectively snap-fastened and fixed in the snap-fastening grooves in the locking grooves. The pressing parts on the outer side of the locking body respectively leak out of the locking holes on both sides of the milk box upper cover. The hook parts of the locking body respectively extend out of the bottom cover opening of the milk box upper cover and the side grooves on both sides of the milk box lower cover (3), and are simultaneously snap-fastened and fixed to the hook grooves (101) on both sides of the top box opening of the milk box (1). Locking springs (902) are respectively provided between the locking body and the inner wall of the milk box upper cover.

4. The detachable coffee machine milk frothing device according to claim 1, characterized in that The milk box (1) and the milk box upper cover (7) are connected to form a rectangular parallelepiped. The outer diameter of one side of the nipple assembly (8) of the milk box is set with a transition slope from the top to the bottom and inward. The nipple assembly corresponding to the outer side of the transition slope is obliquely set at the outer diameter of the milk box.

5. The detachable milk frothing device of a coffee machine according to claim 1, characterized in that A lower rib groove (102) is provided on one side of the top box opening of the milk box (1), a positioning rib (302) is provided on one side of the milk box lower cover (3) corresponding to the lower rib groove, and an upper rib groove is provided on one side of the milk box upper cover (7) corresponding to the positioning rib, and the positioning rib of the milk box lower cover corresponds to the upper rib groove of the milk box upper cover and the lower rib groove of the milk box for guiding the milk box to be loaded.

6. A detachable foaming mechanism of a coffee machine milk foaming device, wherein the main body of the foaming mechanism is a foamer assembly, characterized in that A bubbler pipe inner plug (11) is provided in the bubbler pipe at one end of the connection between the bubbler pipe (6) of the bubbler assembly and the bubbler body (504) of the steam inlet assembly (5), the outer diameter of the bubbler pipe inner plug in the bubbler pipe is provided with a two-level step circumference, the outer diameter of the bubbler body in the bubbler pipe is provided with a three-level step circumference, the pipe opening on this side of the bubbler pipe is provided with a bubbler pipe cover (12), the other step circumference of the outer diameter of the bubbler body and the cover opening at one end of the bubbler pipe are limited to the pipe opening of the bubbler pipe, while the positioning block (5041) with a raised outer diameter of the bubbler body is interference fit over the cover opening at the other end of the bubble pipe cover and is screwed into the spiral hole (1201) on one side of the bubble pipe cover to a locking position; a bubbler is fixedly provided in the hole at the end raised by the bubbler body in the bubbler pipe. The inner plug (503) is symmetrically provided with a positioning column (5042) on the outer diameter of the hole at the end protrusion, and the positioning column is screwed into the L-shaped groove (1101) opened at the plug mouth of the bubbler tube inner plug in the bubbler main pipe. Symmetrical bubble grooves (5043) and bubble holes (5044) are respectively provided on both sides of the outer diameter between the three-step stepped circumference of the bubbler main body and the hole at the end protrusion; the bubbler main pipe is a venturi tube with a tapered diameter increasing in sequence, and the bubbler tube inner plug at one end of the steam inlet component and the three-step stepped circumference of the bubbler main body are provided. The bubbler main pipe is provided with a mounting hole at the air inlet component (4) and a connecting hole at the straw component (10) at the connection between the bubbler main body and the bubbler tube inner plug in the bubbler main pipe, and the bubbler main pipe at the other end of the steam inlet component is symmetrically provided with a nipple component (8).

7. The frothing mechanism of the detachable milk frothing device of the coffee machine according to claim 6, characterized in that The nipple body (801) of the nipple assembly (8) is inclined. L " shape, one end of the nipple body is inserted into the notch of the inner diameter of the hole on the milk box cover (7) through the limiting rib (8011) with a raised outer diameter of the port, and then connected to the bubbler main pipe (6) and then rotated and fixed, and the limiting ring (8012) with a raised outer diameter of the nipple body at the limiting rib is abutted against the hole on the milk box cover for limiting position; the other end of the nipple body is provided with a telescopic milk tube (803), and a telescopic milk tube sealing ring (802) is provided at the connection between the telescopic milk tube and the nipple body.

8. The frothing mechanism of the detachable milk frothing device of the coffee machine according to claim 6, characterized in that A milk box joint sealing ring (502) is provided in the opening at the other end of the bubbler body (504) of the steam inlet assembly (5) and is fastened and fixed to the bubbler body through the bubbler cover (501). The outer diameter and the aperture of the milk box joint sealing ring are larger than the outer diameter and the aperture of the bubbler inner plug (503). A transition cavity is provided between the bubbler inner plug and the milk box joint sealing ring bracket in the bubbler body.

9. The frothing mechanism of the detachable milk frothing device of the coffee machine according to claim 6, characterized in that The straw body (1001) of the straw assembly (10) is connected to the bubbler main pipe (6) via a straw joint (1002), and a straw inner plug (1003) is provided in the straw joint at the connection point.

10. The frothing mechanism of the detachable milk frothing device of the coffee machine according to claim 6, characterized in that A milk box air inlet sheet (401) is provided in the air inlet of the air inlet body (402) at one end of the air inlet assembly (4), and an opening at the other end of the air inlet body is connected to the connecting hole of the straw assembly of the bubbler main pipe (6), and a duckbill (403) is provided in the connecting hole of the bubbler main pipe at the connecting point, and the flat opening at one end of the duckbill is inserted into the connecting hole of the bubbler main pipe, and the round opening at the other end of the duckbill is limited to the opening of the connecting hole of the bubbler main pipe. The air inlet assembly is arranged in the milk box upper cover (7), and an air inlet gap is provided between the air inlet assembly and the inner wall of the milk box upper cover.

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